package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * 课程模块的DAO层的实现类
 */
public class CourseDaoImpl implements CourseDao {

    @Override
    public List<Course> findCourseList() {
        //1、 创建QueryRunner
        QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

        //2、编写sql, 判断是够删除 去除is_del=0 的数据， 未删除的数据
        String sql = "select id, course_name, price, sort_num, status from course where is_del=?";
        try {
            List<Course> courseList = qr.query(sql, new BeanListHandler<Course>(Course.class), 0);

            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {

        try {
            // 1、创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            // 2、编写sql， 当前查询为多条件不定项查询
            // 2.1 创建StringBuffer对象，将SQL添加到缓冲区
            StringBuffer sb = new StringBuffer("SELECT id, course_name, price, sort_num, STATUS from course where 1=1 and is_del=?");

            //2.2 创建List保存参数
            List<Object> list = new ArrayList<>();
            list.add(0);

            //2.3 判断传入的参数是否为空
            if(courseName != null && courseName!=""){
                sb.append(" AND course_name LIKE ?");
                //Like 查询需要拼接 %
                courseName = "%"+courseName+"%";
                list.add(courseName);
            }

            if(status != null && status!=""){
                sb.append(" AND STATUS= ?");
                //将status转化为 int
                int i = Integer.parseInt(status);
                list.add(i);
            }
            //执行查询
            List<Course> courseList = qr.query(sb.toString(), new BeanListHandler<Course>(Course.class), list.toArray());
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    @Override
    public int saveCourseSalesInfo(Course course) {
        try {
            // 1、创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            // 2、编写sql
            String sql = "INSERT INTO course(\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "STATUS,\n" +
                    "create_time,\n" +
                    "update_time\n" +
                    ") VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?);";

            // 3、准备参数
            Object[] param = {course.getCourse_name(), course.getBrief(),course.getTeacher_name(),
                    course.getTeacher_info(), course.getPreview_first_field(), course.getPreview_second_field(),
                    course.getDiscounts(), course.getPrice(), course.getPrice_tag(), course.getShare_image_title(),
                    course.getShare_title(), course.getShare_description(), course.getCourse_description(),
                    course.getCourse_img_url(), course.getStatus(), course.getCreate_time(), course.getUpdate_time()};

            // 4、执行插入操作
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }

    }

    @Override
    public Course findCourseById(int id) {

        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "\n" +
                    "SELECT \n" +
                    "id,\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "course_img_url,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "STATUS\n" +
                    "FROM course  WHERE id = ?;";

            Course course = qr.query(sql, new BeanHandler<Course>(Course.class), id);
            return course;


        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }


    }

    @Override
    public int updateCourseSaleInfo(Course course) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET \n" +
                    "course_name = ?,\n" +
                    "brief = ?,\n" +
                    "teacher_name = ?,\n" +
                    "teacher_info = ?,\n" +
                    "preview_first_field = ?,\n" +
                    "preview_second_field = ?,\n" +
                    "discounts = ?,\n" +
                    "price = ?,\n" +
                    "price_tag = ?,\n" +
                    "share_image_title = ?,\n" +
                    "share_title = ?,\n" +
                    "share_description = ?,\n" +
                    "course_description = ?,\n" +
                    "course_img_url = ?,\n" +
                    "update_time = ?\n" +
                    "WHERE id = ?";

            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
                    course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),
                    course.getShare_image_title(),course.getShare_title(),course.getShare_description(),course.getCourse_description(),
                    course.getCourse_img_url(),course.getUpdate_time(),course.getId()};

            int row  = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    @Override
    public int updateCourseStatus(Course course) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET STATUS = ? ,update_time = ? WHERE id = ?";

            Object[] param = {course.getStatus(),course.getUpdate_time(),course.getId()};

            int row = qr.update(sql, param);

            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }
}
